How to Measure resistance of digital multimter Professional?
Resistance is measured at the electrical barrier. Resistance values vary widely, from a few milliohms (mΩ) for contact resistance to billions of ohms for insulation resistance. Many DMMs measure resistances as small as 0.1 ohms, and some measurements can be as high as 300 megohms (300,000,000ohms). If the resistance is extremely large, the Fluke multimeter will display "OL", indicating that the measured resistance exceeds the range. When measuring an open circuit, "OL" is displayed.
Atsparumas turi būti matuojamas išjungus grandinės maitinimą, kitaip bus sugadintas skaitiklis arba plokštė. Kai kurie skaitmeniniai multimetrai atlieka apsaugos funkciją, kai įtampos signalas yra klaidingai prijungtas varžos režimu. Skirtingi DMM modeliai turi skirtingas apsaugos galimybes.
For accurate measurements of low resistance, the resistance of the measuring lead must be subtracted from the measured value. Typical test lead resistance values are between {{0}}.2Ω and 0.5Ω. If the resistance of the test leads is greater than 1Ω, the test leads should be replaced.
Jei skaitmeninis multimetras tiekia mažesnę nei 0,6 V nuolatinės srovės įtampą varžai matuoti, jis gali išmatuoti diodu arba puslaidininkiu izoliuotos plokštės varžos vertę. Jį galima išbandyti nenuimant rezistoriaus.
